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[ALSA] dynamic minors (3/6): store device-specific object pointers dynamically

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Instead of storing the pointers to the device-specific structures in an
array, put them into the struct snd_minor, and look them up dynamically.

This makes the device type modules independent of the minor number
encoding.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch
2005-11-20 14:06:59 +01:00
committed by Jaroslav Kysela
parent 6983b7240c
commit f87135f56c
17 changed files with 278 additions and 197 deletions
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7
sound/core/oss/mixer_oss.c
View File

@@ -41,12 +41,13 @@ MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MIXER);
static int snd_mixer_oss_open(struct inode *inode, struct file *file)
{
int cardnum = SNDRV_MINOR_OSS_CARD(iminor(inode));
struct snd_card *card;
struct snd_mixer_oss_file *fmixer;
int err;
if ((card = snd_cards[cardnum]) == NULL)
card = snd_lookup_oss_minor_data(iminor(inode),
SNDRV_OSS_DEVICE_TYPE_MIXER);
if (card == NULL)
return -ENODEV;
if (card->mixer_oss == NULL)
return -ENODEV;
@@ -1286,7 +1287,7 @@ static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd)
sprintf(name, "mixer%i%i", card->number, 0);
if ((err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER,
card, 0,
&snd_mixer_oss_f_ops,
&snd_mixer_oss_f_ops, card,
name)) < 0) {
snd_printk(KERN_ERR "unable to register OSS mixer device %i:%i\n",
card->number, 0);

14
sound/core/oss/pcm_oss.c
View File

@@ -1834,9 +1834,6 @@ static int snd_task_name(struct task_struct *task, char *name, size_t size)
static int snd_pcm_oss_open(struct inode *inode, struct file *file)
{
int minor = iminor(inode);
int cardnum = SNDRV_MINOR_OSS_CARD(minor);
int device;
int err;
char task_name[32];
struct snd_pcm *pcm;
@@ -1845,11 +1842,8 @@ static int snd_pcm_oss_open(struct inode *inode, struct file *file)
int nonblock;
wait_queue_t wait;
snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
device = SNDRV_MINOR_OSS_DEVICE(minor) == SNDRV_MINOR_OSS_PCM1 ?
adsp_map[cardnum] : dsp_map[cardnum];
pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + device];
pcm = snd_lookup_oss_minor_data(iminor(inode),
SNDRV_OSS_DEVICE_TYPE_PCM);
if (pcm == NULL) {
err = -ENODEV;
goto __error1;
@@ -1890,7 +1884,7 @@ static int snd_pcm_oss_open(struct inode *inode, struct file *file)
down(&pcm->open_mutex);
while (1) {
err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
minor, psetup, csetup);
iminor(inode), psetup, csetup);
if (err >= 0)
break;
if (err == -EAGAIN) {
@@ -2450,7 +2444,7 @@ static void register_oss_dsp(struct snd_pcm *pcm, int index)
sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
pcm->card, index, &snd_pcm_oss_f_reg,
name) < 0) {
pcm, name) < 0) {
snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
pcm->card->number, pcm->device);
}